Factors Affecting Blossom Quality of Phalaenopsis after Flower Bud Differentiation

To improve the blossom quality of the butterfly orchid, Phalaenopsis, the V31 variety (Dtps. Tailin Red Angel V31) was applied to study the factors that might affect it. During the flower bud differentiation period, the fertilizing solution, light exposure, environmental temperature, etc. were altered to observe the effects. The results showed that (a) when the N:P2O5:K2O ratio of the Peters Professional Fertilizer was 10:30:20, the fertilizer concentration at 1,500 times, the mixing ratio at 2 fertilizer to 1 water, the light intensity in the range of 15,000 to 25,000 Lx, and the day/night temperature at 26-28℃/16-18℃, the butterfly orchid had the most buds with largest panicles; (b) when the Peters Professional Fertilizer with a N:P2O5:K2O ratio of 20:20:20 was applied, the largest orchid corolla resulted; and (c) both temperature and light intensity affected significantly on the blooming process-at high temperature and under intense light, there would be 2 to 4 more blossoms in 30 days than otherwise.